Based on the fatigue cumulative damage models, a damage evolution equation for flexural fatigue of SFRPC slabs is set up.
结合原有的混凝土疲劳损伤模型，建立了预应力钢纤维混凝土板的疲劳损伤演变方程。
In this dissertation, the theory which is known of concrete structure fatigue cumulative damage and damage detection is narrated.
本文阐述了已有的混凝土结构疲劳累积损伤理论和疲劳损伤识别原理。
The main classic fatigue cumulative damage theories and the representative definitions of damage variable have been introduced briefly.
简要介绍了经典的疲劳累积损伤理论和几个典型的损伤变量定义式。
Fatigue reliability interference model is established based on fuzzy cumulative damage of components, then general formula and simulation methods of fuzzy reliability estimation are derived.
建立了基于模糊累积损伤的构件疲劳可靠性干涉模型，导出了模糊可靠度评定的一般公式和仿真方法。
Therefore, the distribution configuration of the fatigue damage threshold is the same as the distribution configuration of lineal cumulative damage.
因此，新定义的疲劳损伤阀值与线性累积损伤之间在分布形态上是一致的。
The fatigue damage cumulative rule plays a key role on the structure design against fatigue.
疲劳累积损伤分布规律是结构疲劳可靠性分析与设计的关键内容之一。
The linear fatigue of the jacket structure was evaluated by using wave spectrum analysis theory and theory of linear cumulative damage.
采用随机波浪谱和线性疲劳累积损伤理论对导管架式海洋平台在波浪荷载作用下的疲劳可靠性进行研究。
But the common linear fatigue damage cumulative rule neglects the fatigue damage which is brought by the high frequency and low stress.
一般的线性损伤累积理论忽略了高频率低疲劳应力所引起的构件疲劳损伤，致使预测结果与实际寿命相差很大。
It is important to study fatigue stress - strain hysteresis Loop on cumulative fatigue damage.
研究疲劳应力应变滞后环对探讨疲劳积累损伤很重要。
The cumulative damage of the steel structure occurred by overload, fatigue and other reasons in service may deteriorate the safety of the structure seriously.
钢结构在服役过程中，因超载、疲劳等原因会引起损伤累积，极大地影响了结构的安全使用。
By using the nonlinear cumulative fatigue damage model considering the influence of the fatigue limit and the cyclic stress amplitude, the remaining life formula of the.
获得了用电阻变化测量疲劳损伤的公式，应用计及疲劳极限和循环应力幅影响的非线性累积疲劳损伤模型，给出了金属材料疲劳损伤的剩余寿命预测公式。
A cumulative damage model is proposed, which can be used to consider the influence of in plane bi-axial stresses and mean stress on the fatigue behavior of unidirectional laminates.
推荐了一种应变损伤累积模型，能够考虑单向板面内多轴应力和平均应力的影响。
The damage variable is defined as the residual strain of concrete under constant amplitude fatigue loading, and the law of cumulative damage and its evolution are obtained.
由等幅疲劳残余应变，定义了损伤变量，得到了相应的损伤积累和演化规律。
The advantages and disadvantages of the fatigue damage cumulative rules are discussed.
比较各种疲劳损伤累积理论计算方法的优缺点。
The fatigue life and cumulative damage of ammunition feeding spring in automatic naval gun of medium calibre have been analysed.
本文研究了中口径自动舰炮输弹簧的疲劳寿命及损伤规律。
Finally, the methods for calculating fatigue life based on fracture mechanics for welded node and cumulative damage theory for bolted sphere node respectively have been presented.
本文在大量实验的基础上提出了对焊接节点采用断裂力学的方法和对螺栓球节点应用累积损伤理论估算它们疲劳寿命的计算方法。
So it will result in error when calculating the fatigue life, and it is significant to study on the variable fatigue life and the cumulative damage theories.
因此，对变幅疲劳寿命和累积损伤理论做进一步研究是很有意义的。
Taking into account of the effect of loading history, a new nonlinear cumulative damage model is established and the steps to predict remaining fatigue life with the model is given.
在考虑加载历史对疲劳寿命的影响下，建立了描述混凝土累积损伤的非线性模型；并根据损伤等效原理给出了混凝土疲劳剩余寿命的预测方法和步骤。
The initial damage and the cumulative damage during operation are quantitatively measured with the main fatigue crack length in the structure.
首先将结构的初始损伤、使用过程中的损伤累积用主裂纹长度的分布加以定量描述。
Fatigue damage cumulative rule after calendar corrosive environment is crucial for determining calendar life of aircraft structure.
这些曲线是确定受腐蚀金属机件或构件疲劳日历寿命的依据。
Fatigue damage cumulative rule after calendar corrosive environment is crucial for determining calendar life of aircraft structure.
这些曲线是确定受腐蚀金属机件或构件疲劳日历寿命的依据。
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